Washington: Alexandria Ocasio-Cortez, the youngest woman to serve in the US Congress, has slammed President Donald Trump for falsely implying that she and other freshman House Democrats were not natural-born American citizens.

On Sunday, Trump in a series of tweets said: "So interesting to see 'progressive' Democrat Congresswomen, who originally came from countries whose governments are a complete and total catastrophe, the worst, most corrupt and inept anywhere in the world (if they even have a functioning government at all), now loudly and viciously telling the people of the US, the greatest and most powerful nation on earth, how our government is to be run.